LIFECYCLE-BASED DISCRETIZATION OF
BRIDGE PERFORMANCE INDICATORS
Dimosthenis Kifokeris
– Ph.D. candidate, Aristotle University of Thessaloniki,
• Damage degree, frequency, response, wearout, settlement and
foundation deficiency of the constituent bridge parts due to SSI
(soil-structure interaction) during ground motions
• Ductility demand
• Fragility and vulnerability curves, most often interconnected
• Stiffness
• Seismic resilience
The above were the results of a targeted and filtered literature review of
the recent (2006-2016) Greek research output
All BPIs were aggregately researched under the light of the above
performance indices categories. Hence, each one is simultaneously
part of every indices group.
• Project performance: the level of the desirable success in meeting
the stated technical performance specifications and the mission to
be performed
• Success determinants of project performance:
(i) Cost of completion
(ii) Time of completion
(iii) Quality of deliverables
• Additional determinants (considered separately or as aspects of the
quality of the deliverables): safety, client satisfaction etc.
• Constructability: the optimum use of construction knowledge and
experience in planning, design, procurement and field operations to
achieve overall project objectives
• Sustainability: the promotion of the development that meets the
needs of the present without compromising the ability of future
generations to achieve their own
• Risk analysis: the collective methodology of risk assessment,
through a systematic process of decision-making in order to accept
a known or assumed risk and/or reducing the harmful consequences
or probability of occurrence of the risk
LIFECYCLE MANAGEMENT RELATED
NOTIONS
Constructability, sustainability and risk analysis, separately and in
combination, aim for the achievement of the highest level of project
performance by optimizing the success determinants.
Each utilizes distinct cognitive, methodological and mathematical tools
and applications.
For a holistic lifecycle management, from the feasibility study of a
project until its end of life, all three should be integrated, interconnected
and facilitated.
RELATED NOTIONS AND LIFECYCLE
MANAGEMENT
•
Constructability
- implemented through 23
Constructability Concepts (CCs)
- pertains mainly the initiation,
execution and delivery phases
- extends in the use phase
•
Sustainability
- implemented through 32 economic
(EcSPI), 19 social (SoSPI) and 36
environmental (EnSPI) sustainability
performance indicators
- pertains all of the project lifecycle,
but more heavily the use and
end-of-life phases
•
Risk analysis
- performed through risk identification,
qualitative and/or quantitative
assessment, response and monitoring
- pertains all of the project lifecycle
• Each index encompasses all
the noted BPIs
• All BPIs should be checked
for the corresponding
lifecycle phases pertained by
the index and in conjunction
with the CCs and SPIs
• Where the indices overlap,
the corresponding BPIs
should be multiply checked
under the light of every index
• In the recent literature originating from Greek researchers, the most
commonly researched BPIs account mainly for the cost efficiency,
durability, safety, service life, serviceability and traffic safety of a
bridge
• A true holistic lifecycle management plan for bridges should
incorporate, interconnect and integrate the distinctive BPIs, grouped
under the corresponding performance indices, along with the SPIs,
CCs and risk analysis procedures
• The discretization and integration of BPIs, SPIs and CCs could
expand to cover more data and also include several types of new
indicators, towards the production of a general approach for
enhanced lifecycle management for bridges and the standardization
of bridge quality standards at the European level
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